IE38629B1 - Improvements in or relating to loud speakers of the moving coil type - Google Patents
Improvements in or relating to loud speakers of the moving coil typeInfo
- Publication number
- IE38629B1 IE38629B1 IE2238/73A IE223873A IE38629B1 IE 38629 B1 IE38629 B1 IE 38629B1 IE 2238/73 A IE2238/73 A IE 2238/73A IE 223873 A IE223873 A IE 223873A IE 38629 B1 IE38629 B1 IE 38629B1
- Authority
- IE
- Ireland
- Prior art keywords
- air gap
- coil
- magnetic circuit
- loud speaker
- coil type
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
A loud speaker of the oscillating coil type including a voice coil associated with a loud speaker membrane and a magnetic circuit having an annular air gap in which the coil is located in such a manner that in its neutral, non-energized condition the coil projects axially from the air gap substantially uniformly to both sides thereof so as to be able to oscillate substantially symmetrically about the middle plane of the air gap, a cylindric element of an electrically conducting material being rigidly associated with the magnetic circuit concentrically with the coil and extending into the air gap from one side thereof, characterised in that the cylindric element is extended so as to additionally project outwardly from the air gap to the other side thereof. It is obtained hereby that the voice coil is inductively short circuited in all working positions thereof, whereby it responds rapidly to changes of the input voltage and thus causes the sound to be reproduced with a minimum of distortion.
[US3935399A]
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK646572AA DK142299B (en) | 1972-12-27 | 1972-12-27 | Speaker. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE38629L IE38629L (en) | 1974-06-27 |
| IE38629B1 true IE38629B1 (en) | 1978-04-26 |
Family
ID=8148772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE2238/73A IE38629B1 (en) | 1972-12-27 | 1973-12-11 | Improvements in or relating to loud speakers of the moving coil type |
Country Status (16)
| Country | Link |
|---|---|
| US (1) | US3935399A (en) |
| JP (1) | JPS5639600B2 (en) |
| AT (1) | AT344806B (en) |
| BE (1) | BE808795A (en) |
| CA (1) | CA1014649A (en) |
| CH (1) | CH558625A (en) |
| DE (1) | DE2362001C2 (en) |
| DK (1) | DK142299B (en) |
| ES (1) | ES422079A1 (en) |
| FR (1) | FR2238309B1 (en) |
| GB (1) | GB1460744A (en) |
| IE (1) | IE38629B1 (en) |
| IT (1) | IT1000950B (en) |
| NL (1) | NL7317654A (en) |
| NO (1) | NO135083C (en) |
| SE (1) | SE384119C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5376824A (en) * | 1976-12-20 | 1978-07-07 | Hitachi Ltd | Speaker |
| JPS53162719U (en) * | 1977-05-26 | 1978-12-20 | ||
| JPS5837173B2 (en) * | 1980-06-26 | 1983-08-15 | 株式会社 柳沢鉄工所 | Laminate clamping pin spacing adjustment device in automatic binding machine |
| US4360707A (en) * | 1980-11-24 | 1982-11-23 | Cts Corporation | Digitally driven combination coils for electrodynamic acoustic transducers |
| DE3046551A1 (en) * | 1980-12-10 | 1982-07-22 | Isophon-Werke Gmbh, 1000 Berlin | Dynamic loudspeaker assembly - has screen below and above air gap to reduce distortion |
| US4661973A (en) * | 1983-12-03 | 1987-04-28 | Pioneer Electronic Corporation | Minimization of distortion due to a voice coil displacement in a speaker unit |
| DE3426042A1 (en) * | 1984-07-14 | 1986-01-16 | Vacuumschmelze Gmbh, 6450 Hanau | ELECTRIC FLAT COIL DRIVE |
| DE3670417D1 (en) * | 1985-07-17 | 1990-05-17 | Studer Willi Ag | MAGNETIC SYSTEM FOR A DYNAMIC SPEAKER. |
| US4897877A (en) * | 1987-05-18 | 1990-01-30 | Oxford Speaker Company | Sub-woofer driver combination with dual voice coil arrangement |
| CN107509147B (en) * | 2017-09-21 | 2023-12-12 | 惠州迪芬尼声学科技股份有限公司 | Loudspeaker magnetic circuit system with U-shaped short circuit ring |
| US11942241B2 (en) | 2021-05-20 | 2024-03-26 | Lubomir Dostal | Electric cable |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4431104Y1 (en) * | 1967-06-23 | 1969-12-22 |
-
1972
- 1972-12-27 DK DK646572AA patent/DK142299B/en not_active IP Right Cessation
-
1973
- 1973-12-11 IE IE2238/73A patent/IE38629B1/en unknown
- 1973-12-12 CA CA187,985A patent/CA1014649A/en not_active Expired
- 1973-12-12 US US05/423,896 patent/US3935399A/en not_active Expired - Lifetime
- 1973-12-13 DE DE2362001A patent/DE2362001C2/en not_active Expired
- 1973-12-14 CH CH1750973A patent/CH558625A/en not_active IP Right Cessation
- 1973-12-14 FR FR7344706A patent/FR2238309B1/fr not_active Expired
- 1973-12-17 AT AT1053773A patent/AT344806B/en not_active IP Right Cessation
- 1973-12-18 SE SE7317088A patent/SE384119C/en unknown
- 1973-12-19 NO NO4863/73A patent/NO135083C/no unknown
- 1973-12-19 BE BE2053298A patent/BE808795A/en not_active IP Right Cessation
- 1973-12-21 IT IT8412/73A patent/IT1000950B/en active
- 1973-12-22 NL NL7317654A patent/NL7317654A/xx not_active Application Discontinuation
- 1973-12-22 ES ES422079A patent/ES422079A1/en not_active Expired
- 1973-12-24 JP JP744643A patent/JPS5639600B2/ja not_active Expired
- 1973-12-27 GB GB5796873A patent/GB1460744A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5639600B2 (en) | 1981-09-14 |
| GB1460744A (en) | 1977-01-06 |
| CA1014649A (en) | 1977-07-26 |
| NO135083B (en) | 1976-10-25 |
| IT1000950B (en) | 1976-04-10 |
| SE384119B (en) | 1976-04-12 |
| JPS507515A (en) | 1975-01-25 |
| AT344806B (en) | 1978-08-10 |
| DE2362001A1 (en) | 1974-07-11 |
| ES422079A1 (en) | 1976-08-01 |
| ATA1053773A (en) | 1975-10-15 |
| NL7317654A (en) | 1974-07-01 |
| DK142299B (en) | 1980-10-06 |
| IE38629L (en) | 1974-06-27 |
| SE384119C (en) | 1984-07-17 |
| AU6363473A (en) | 1975-06-19 |
| NO135083C (en) | 1977-02-02 |
| BE808795A (en) | 1974-04-16 |
| DE2362001C2 (en) | 1982-05-06 |
| DK142299C (en) | 1981-03-02 |
| FR2238309A1 (en) | 1975-02-14 |
| US3935399A (en) | 1976-01-27 |
| FR2238309B1 (en) | 1981-09-04 |
| CH558625A (en) | 1975-01-31 |
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